Lateral pin and lateral pin type tooth point structure for use with lateral pin type fixture for working machine bucket

ABSTRACT

A lateral pin type tooth point structure for working machine bucket with which rust will not be generated in the critical portions of the lateral pin; there is no need for using a special tool for removing the pin as is required with the prior art, i.e., pin removal can be made simply and easily simply by using an ordinal tool; the need for making a hammering operation in pin removal as is required with the prior art is eliminated, which gives excellency in terms of securing the safety of operator; and the lateral pin body head portion and the set bolt head portion can be protected against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket.

TECHNICAL FIELD

The present invention includes a first invention and a second invention, the first invention relating to a novel lateral pin for use with lateral pin type fixture for working machine bucket that, even when used for a long period of time, will not generate rust in the critical portions thereof; especially, allows the pin removal to be made simply and easily; and eliminates the need for making a hazardous hammering operation, thereby being capable of securing the operator's safety, and the second invention relating to a novel lateral pin type tooth point structure for working machine bucket that, even when used for a long period of time, will not generate rust in the critical portions of a lateral pin, i.e., an internal thread part provided for the lateral pin and an external thread part tightened thereto in the state of being screw-fastened; yet allows the pertinent lateral pin to be removed simply and easily; and eliminates the need for making a hazardous hammering operation in removing the pertinent lateral pin as is required with the prior art, thereby being capable of securing the operator's safety.

BACKGROUND ART

With various buckets for use by mounting to a working machine, such as a power shovel, a shovel loader, or the like, the rear parts of a plurality of tooth points are fitted to a plurality of (for example, four or five) adapters disposed in a row, being equally spaced, on the ground excavation edge part side of the bucket, respectively, a lateral pin being fitted into the respective lateral holes penetrating through the adapter and the pertinent tooth point, thereby the tooth point being fixedly installed to the adapter so as to be removable.

The configuration and the use state of such a conventional type of lateral pin will be outlined with reference to FIG. 5 to FIG. 9.

In first and second examples of prior art as shown in FIG. 5 to FIG. 9, a loading projected portion 22 a of an adapter 22 disposed on the ground excavation edge part side of a working machine bucket 21 is fitted into a receiving recessed portion 25 provided in a tooth point 24, and a lateral pin 26 is driven in with a hammer, or the like, such that it is substantially penetrated through a lateral hole provided in the loading projected portion 22 a, and lateral holes provided in the side walls of the receiving recessed portion 25, whereby these adapter 22 and tooth point 24 are fixedly installed as if they were an integral part.

As the lateral pin 26, a lateral pin as shown in FIG. 6 and FIG. 7 is used which has a spring washer part 28 which is butted against the lateral hole internal wall of the adapter 22 for prevention of dropping off, being accommodated in a smaller diameter part 27 a provided in the central portion along the lengthwise direction of a pin body 27 having a diameter slightly smaller than that of the lateral hole.

The outside diameter of this spring washer part 28 is larger than the inside diameter of the lateral hole in the adapter 22, and at the time of fitting into the lateral hole, the spring function causes the outside diameter of the spring washer part 28 to be equal to the lateral hole. Then when the lateral pin 26 is completely driven in, the spring washer part 28 is butted against the lateral hole internal wall of the adapter 22 in the course of returning to the original dimension. Thus, the lateral pin 26 provides a dropping-off prevention capability.

In a second example of prior art as shown in FIG. 8 and FIG. 9, the loading projected portion of an adapter 22 disposed on the ground excavation edge part side of a working machine bucket 21 is fitted into a receiving recessed portion 25 provided in a tooth point 24, and a lateral pin 31 is driven in with a hammer, or the like, from the outside of a lateral hole provided on one side of the tooth point 24 such that it is substantially penetrated through a lateral hole provided in the loading projected portion, and lateral holes provided in the side walls of the receiving recessed portion 25.

In this case, a retainer 32 disposed at the outside of the end of a lateral hole provided in the adapter 22 that is on the other side of the tooth point 24 is engaged with a pin groove 31 a provided in the vicinity of the end of the lateral pin 31, whereby these adapter 22 and tooth point 24 are fixedly installed to each other as if they were an integral part, and the lateral pin 31 is prevented from dropping-off.

As shown in FIG. 9, the retainer 32 is comprised of a cylindrical element 33 which is attached to the lateral hole in the adapter 22, and a spring washer 34 of a split type attached to this cylindrical element 33, the inside diameter of the spring washer 34 being made smaller than the outside diameter of the lateral pin 31, and being expanded by the spring function at the time of the lateral pin being driven in, which is followed by the inside diameter part of the spring washer 34 being engaged with the pin groove 31 a provided in the vicinity of the end of the lateral pin 31 for preventing it from dropping off.

However, in the case of the above-described first example of prior art, repetition of the actual operation outdoors has caused the spring washer part 28 to generate rust, which has often resulted in increased adhesion of the adapter 22 to the internal wall of the lateral hole to make it extremely difficult to extract the lateral pin 26.

In addition, in the case of the above-described second example of prior art, no adequate tool for extracting the lateral pin 31 from the retainer 32 has been available, which has often made it extremely difficult to extract the lateral pin 31.

Further, in the case of either of the first and second examples of prior art, driving-in and extraction operations with the use of a hammer are mandatory, and those operations are extremely hazardous, because they have led to such an accident as that of one hand of an operator holding a lateral pin extraction tool having been wrongly struck, resulting in a serious injury being caused.

Patent literature 1 discloses a ground-leveling plate for a bucket to be mounted to such a civil engineering/construction machine as a power shovel, or the like, with which the rear part of a tooth point is fitted to an adapter previously welded to the ground excavation edge part of the bucket, and a lateral pin is force-fitted into the respective lateral holes penetrating through the adapter and the tooth point for making the tooth point removable.

Also in the case of this Patent literature 1, no special ideas about lateral pin extraction are given, and no tools for lateral pin extraction are mentioned.

[Patent document 1] Japanese Patent Laid-Open Publication No. 9-137477/1997

SUMMARY OF THE INVENTION

The problem to be solved by the first invention is that there exists no lateral pin for use with lateral pin type fixture for working machine bucket that, even when used outdoors over a long period of time, the critical portions of the lateral pin will not generate rust, and yet eliminates the need for using a special tool to remove the pin, that is, allows pin removal to be carried out simply and easily only with an ordinal tool, and that avoids the need for making a hazardous hammering operation, thus being excellent in terms of securing the safety of operator.

The problem to be solved by the second invention is that there exists no lateral pin type tooth point structure for working machine bucket that eliminates the possibility of rust being generated in the critical portions of the lateral pin, i.e., the internal thread part provided for the pin body, and the external thread part provided in the set screw fastened to the internal thread part in the tightened state, even in case of outdoor use over a long period of time; eliminates the need for using a special tool for removing the lateral pin, i.e., allows pin removal to be made simply and easily simply by using an ordinal tool, such as a ratchet wrench, a ring wrench, or the like; and avoids the need for making a hazardous hammering operation as is required with the prior art, thus being excellent in terms of securing the safety of operator.

MEANS FOR SOLVING THE PROBLEMS

The lateral pin of the first invention for use with lateral pin type fixture for working machine bucket provides, as a most important feature thereof, a lateral pin for use with lateral pin type fixture for working machine bucket that is inserted into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastened on the other side thereof for fixedly installing the tooth point to the adapter, including a bolt type lateral pin body having a threaded part for screw fastening in a projection end part thereof; a washer loaded on the basal end part side of the lateral pin body; a washer and a sealing material against storm water, and the like, intervened on the projection end part side of the lateral pin body; and a screw thread fastener screw-fastened to the threaded part.

The lateral pin pertaining to the second invention for use with lateral pin type fixture for working machine bucket provides, as a most important feature thereof, a lateral pin type tooth point structure for working machine bucket which inserts a lateral pin into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastens the lateral pin on the other side thereof for fixedly installing the tooth point to the adapter, wherein the lateral pin includes a pin body with a polygonal head portion and an internal thread part provided on the insertion tip side thereof, and a set bolt with an external thread part screwed in into the internal thread part of the pin body on the other side of the respective lateral holes, and a polygonal head portion; the tooth point is provided with a receiving recessed portion on the basal end part side thereof into which a loading projected portion of the adapter of the working machine bucket is fitted; on both side walls of this receiving recessed portion, a pair of lateral holes for insertion of the lateral pin is provided; and in the respective regions of the pair of lateral holes, a concaved part for protecting the lateral pin head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket is provided.

According to the lateral pins of the first invention as stated in the respective claims, the following effects will be provided.

The invention as stated in claim 1 can provide a lateral pin for use with lateral pin type fixture for working machine bucket with which, even in the case where the working machine bucket is used outdoors over a long period of time, being exposed to storm water, and the like, the threaded part in the lateral pin body will not generate rust; and especially, at the time of pin removal, there is no need for using a hammer and a special tool for removing the pin, as are required with the prior art, and only with an ordinal tool, the pin removal can be simply and easily made, which assures operational safety.

The invention as stated in claim 2 can provide a lateral pin for use with lateral pin type fixture for working machine bucket with which a configuration including a bolt type lateral pin body provided with an internal thread from a projection end part thereof toward the inside of the same; a washer loaded on the basal end part side of the lateral pin body; a seal washer covered with a sealing material against storm water, and the like, a washer, and a seal washer covered with a sealing material against storm water, and the like, which are intervened on the projection end part side of the lateral pin body; and a bolt screw-fastened to the internal thread of the lateral pin body allows eliminating a problem of occurrence of rust resulting from the moisture entering the threaded part of the bolt and the internal thread, and especially, allows, at the time of pin removal, eliminating the need for using a hammer and a special tool for removing the pin, as are required with the prior art, and allowing the pin removal to be simply and easily made only with an ordinal tool, which assures operational safety.

The invention as stated in claim 3 can provide a lateral pin for use with lateral pin type fixture for working machine bucket with which a configuration including a bolt type lateral pin body provided with an external thread in the projection end part region thereof; a washer loaded on the basal end part side of the lateral pin body; a washer and a seal washer covered with a sealing material against storm water, and the like, which are intervened in the projection end part region of the lateral pin body; and a cap nut screw-fastened to the external thread of the lateral pin body allows eliminating a problem of occurrence of rust resulting from the moisture entering the external thread part of the lateral pin body, and allows eliminating the need for using a special tool for removing the pin, and allowing the pin removal to be simply and easily made only with an ordinal tool, which assures operational safety.

According to the lateral pin type tooth point structures of the second invention as stated in the respective claims, the following effects will be provided.

The invention as stated in claim 4 can provide a lateral pin type tooth point structure for working machine bucket that, by screw connection between a pin body having a polygonal head portion and provided with an internal thread part on the insertion tip side thereof, and a set bolt having a polygonal head portion (i.e., an external thread part of the set bolt screwed in into the internal thread part of the pin body), eliminates the possibility of rust being generated in the critical portions of the lateral pin, i.e., the internal thread part provided for the lateral pin, and the external thread part fastened to the internal thread part in the tightened state, even in case of outdoor use over a long period of time; yet allows an adapter and a tooth point fitted to this adapter to be easily connected with or disconnected from each other, simply by using an ordinal tool, such as a ratchet wrench, a ring wrench, or the like, with no need for using a special tool as is required with the prior art; eliminates the need for making a hazardous hammering operation in pin removal as is required with the prior art, giving excellency in terms of securing the safety of operator; and by concaved parts of the tooth point, is capable of protecting the lateral pin body head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket.

The invention as stated in claim 5 can provide the same effects as those of the invention as stated in claim 4, and according to the invention as stated in claim 5, because a washer and a seal washer having a sealing function are provided which are fitted to the threaded part of the set bolt on the other side of respective lateral holes, rust will not be generated in the threaded parts of the lateral pin and the set bolt even in the case of outdoor use over a long period of time.

The invention as stated in claim 6 can provide the same effects as those of the invention as stated in claim 4, and according to the invention as stated in claim 6, a configuration including a screw connection between a lateral pin body having a polygonal head portion and provided with an internal thread in the insertion tip side thereof and a set bolt having a polygonal head portion (i.e., an external thread part of the set bolt screwed in into an internal thread part of the pin body), and a washer and a seal washer having a sealing function which are fitted to the threaded part of the set bolt on the other side of the respective lateral holes allows an adapter and a tooth point fitted to this adapter to be easily connected with or disconnected from each other, simply by using an ordinal tool, such as a ratchet wrench, a ring wrench, or the like, with no need for using a special tool, and eliminates the need for making a hazardous hammering operation in pin removal as is required with the prior art, giving excellency in terms of securing the safety of operator.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic partial sectional view illustrating the installed state of a lateral pin for use with lateral pin type fixture for working machine bucket pertaining to a variant embodiment 1 of the first invention to an adapter and a tooth point;

FIG. 2 is a schematic exploded view illustrating the disassembled state mainly of the lateral pin pertaining to the variant embodiment 1 of the first invention;

FIG. 3 is a schematic partial sectional view illustrating the installed state of a lateral pin for use with lateral pin type fixture for working machine bucket pertaining to a variant embodiment 2 of the first invention to an adapter and a tooth point;

FIG. 4 is a schematic exploded view illustrating the disassembled state mainly of the lateral pin pertaining to the variant embodiment 2 of the first invention;

FIG. 5 is a perspective side view illustrating a general working machine bucket with lateral pins;

FIG. 6 is an exploded view illustrating the disassembled state of a lateral pin, an adapter and a tooth point of a first example of prior art;

FIG. 7 is a perspective side view of the lateral pin of the first example of prior art;

FIG. 8 is an exploded view illustrating the disassembled state of a lateral pin, an adapter, and a tooth point of a second example of prior art;

FIG. 9 is a perspective side view illustrating a lateral pin retainer of the second example of prior art.

FIG. 10 is an exploded side view illustrating a tooth point and a lateral pin in a lateral pin type tooth point structure for working machine bucket pertaining to a variant embodiment of the second invention;

FIG. 11 is a front view of the tooth point pertaining to the variant embodiment of the second invention;

FIG. 12 is a top view of the tooth point pertaining to the variant embodiment of the second invention;

FIG. 13 is a bottom view of the tooth point pertaining to the variant embodiment of the second invention;

FIG. 14 is a rear view of the tooth point pertaining to the variant embodiment of the second invention;

FIG. 15 is a left side view of the tooth point pertaining to the variant embodiment of the second invention;

FIG. 16 is a right side view of the tooth point pertaining to the variant embodiment of the second invention; and

FIG. 17 is a sectional view illustrating the connected state of the tooth point, the lateral pin, and the adapter in the lateral pin type tooth point structure pertaining to the variant embodiment of the second invention.

FIG. 18 is an enlarged side view of the lateral pin 1, 101 of the variant embodiments of the first and second inventions;

FIG. 19 is an enlarged front view of the lateral pin 1, 101 of the variant embodiments of the first and second inventions;

FIG. 20 is an enlarged longitudinal sectional view taken along line A-A in FIG. 18 of the lateral pin 1, 101 of the variant embodiments of the first and second inventions;

FIG. 21 is a perspective side view illustrating the use state of the lateral pin 1, 101 of the variant embodiments of the first and second inventions;

FIG. 22 is a schematic partial sectional view illustrating the installed state of the lateral pin in the adapter and the tooth point for use with lateral pin type fixture for working machine bucket pertaining to an embodiment 1 of a first invention;

FIG. 23 is a schematic exploded view mainly of the lateral pin pertaining to the embodiment 1 of the first invention;

FIG. 24 is a schematic partial sectional view illustrating the installed state of the lateral pin in the adapter and the tooth point for use with lateral pin type fixture for working machine bucket pertaining to an embodiment 2 of the first invention;

FIG. 25 is a schematic exploded view mainly of the lateral pin pertaining to the embodiment 2 of the first invention;

FIG. 26 is an exploded side view illustrating a tooth point and a lateral pin in a lateral pin type tooth point structure for working machine bucket pertaining to an embodiment of a second invention;

FIG. 27 is a front view of the tooth point pertaining to the embodiment of the second invention;

FIG. 28 is a top view of the tooth point pertaining to the embodiment of the second invention;

FIG. 29 is a bottom view of the tooth point pertaining to the embodiment of the second invention;

FIG. 30 is a rear view of the tooth point pertaining to the embodiment of the second invention;

FIG. 31 is a left side view of the tooth point pertaining to the embodiment of the second invention;

FIG. 32 is a right side view of the tooth point pertaining to the embodiment of the second invention;

FIG. 33 is a sectional view illustrating the connected state of the tooth point, the lateral pin, and the adapter in the lateral pin type tooth point structure pertaining to the embodiment of the second invention.

DETAILED DESCRIPTION OF THE INVENTION

A first invention is intended to provide a lateral pin for use with lateral pin type fixture for working machine bucket that, even when used outdoors over a long period of time, the critical portions of the lateral pin will not generate rust, and yet eliminates the need for using a special tool to remove the pin, that is, allows pin removal to be carried out simply and easily only with an ordinal tool, and that avoids the need for making a hazardous hammering operation, thus being excellent in terms of securing the safety of operator.

The lateral pin of the first invention for use with lateral pin type fixture for working machine bucket has achieved the above-mentioned purpose by means of a lateral pin for use with lateral pin type fixture for working machine bucket that is inserted into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastened on the other side thereof for fixedly installing the tooth point to the adapter, including a bolt type lateral pin body with an internal thread provided from a projection end part thereof toward the inside of the same; a washer loaded on the basal end part side of the lateral pin body; a seal washer covered with a sealing material, or the like, against storm water, a washer, and a seal washer covered with a sealing material, or the like, against storm water, which are intervened on the projection end part side of the lateral pin body; and a bolt screw-fastened to an internal thread of the lateral pin body.

A second invention is intended to provide a lateral pin type tooth point structure for working machine bucket that, by screw connection between a pin body having a polygonal head portion and provided with an internal thread part on the insertion tip side thereof, and a set bolt having a polygonal head portion (i.e., an external thread part of the set bolt screwed in into the internal thread part of the pin body), eliminates the possibility of rust being generated in the critical portions of the lateral pin, i.e., the internal thread part provided for the lateral pin, and the external thread part fastened to the internal thread part in the tightened state, even in case of outdoor use over a long period of time; yet allows an adapter and a tooth point fitted to this adapter to be easily connected with or disconnected from each other, simply by using an ordinal tool, such as a ratchet wrench, a ring wrench, or the like, with no need for using a special tool as is required with the prior art; eliminates the need for making a hazardous hammering operation in pin removal as is required with the prior art, giving excellency in terms of securing the safety of operator; and by concaved parts of the tooth point, is capable of protecting the lateral pin body head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket.

The second invention has achieved the above-mentioned purpose by means of a lateral pin type tooth point structure for working machine bucket which inserts a lateral pin into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastens the lateral pin on the other side thereof for fixedly installing the tooth point to the adapter, wherein the lateral pin includes a pin body with a polygonal head portion and an internal thread part provided on the insertion tip side, and a set bolt with an external thread part screwed in into the internal thread part of the pin body on the other side of the respective lateral holes, and a polygonal head portion; the tooth point is provided with a receiving recessed portion on the basal end part side into which a loading projected portion of the adapter of the working machine bucket is fitted; on both side walls of this receiving recessed portion, a pair of lateral holes for insertion of the lateral pin is provided; and in the respective regions of the pair of lateral holes, a concaved part for protecting the lateral pin head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket is provided.

Embodiments of First Invention

Hereinbelow, a lateral pin for use with lateral pin type fixture for working machine bucket pertaining to embodiments of the first invention will be described in detail.

Embodiment 1

With reference to FIG. 22 and FIG. 23, a lateral pin 1 for use with lateral pin type fixture for a working machine bucket 21 pertaining to the present embodiment 1 will be described.

The lateral pin 1 for use with lateral pin type fixture for working machine bucket pertaining to the present embodiment 1 as shown in FIG. 22 and FIG. 23 is configured such that it allows the adapter 22 and the tooth point 24 for the above-mentioned working machine bucket 21 as shown in FIG. 5 to be firmly connected to each other by the screw fastening method as if they were an integral part.

In other words, as shown in FIG. 22, FIG. 23, and FIG. 18 to FIG. 21, the lateral pin 1 for use with lateral pin type fixture for working machine bucket pertaining to the present embodiment 1 includes a bolt type lateral pin body 2 with an internal thread 3 provided from a projection end part thereof toward the inside of the same; a washer 4 loaded on the basal end part side of the lateral pin body 2; a seal washer 5 covered with a sealing material, such as a rubber gasket, or the like, against storm water, a washer 6, and a seal washer 7 covered with a sealing material, such as a rubber gasket, or the like, against storm water which are intervened on the projection end part side of the lateral pin body 2; and a bolt 8 screw-fastened to an internal thread 3 of the lateral pin body 2.

The lateral pin 1 and adapter 22 may have a configuration as shown in FIG. 1 and FIG. 2 illustrating a variant embodiment 1 of the first invention, and the tooth point 24 may have a recessed part 111 b as in the embodiment of the second invention.

When the lateral pin 1 for use with lateral pin type fixture for working machine bucket of the present embodiment 1 is used to fixedly install the tooth point 24 to the adapter 22 as if they were an integral part, a receiving recessed portion 25 provided in the tooth point 24 is first opposed to a loading projected portion 22 a of the adapter 22, then the tooth point 24 is inserted into the adapter 22.

Next, the washer 4 is loaded on the basal end part side of the lateral pin body 2, and this lateral pin body 2 is inserted into a lateral hole 24 a of the tooth point 24 on one side thereof, a lateral hole 22 b of the adapter 22, and a lateral hole 24 a of the tooth point 24 on the other side thereof in this order.

Next, a seal washer 5, a washer 6, and a seal washer 7 are fitted to the bolt 8 in this order, and from the outside of the lateral hole 24 a on the other side of the tooth point 24, the bolt 8 is screwed in into the internal thread 3 to be tightened.

Thus, with the lateral pin 1 for use with lateral pin type fixture for working machine bucket, the adapter 22 and the tooth point 24 can be fixedly installed to each other as if they were an integral part.

Such an operation of fixedly installing the adapter 22 and the tooth point 24 to each other by means of the lateral pin 1 for use with lateral pin type fixture for working machine bucket is repeated by the number of times equal to the number of adapters 22 disposed in a row (for example, 5), whereby the tooth points 24 on the side of the ground-leveling plate 23 can be rigidly and integrally installed to the adapters 22 of the working machine bucket 21, respectively.

Once, by using the lateral pin 1 for use with lateral pin type fixture for working machine bucket of the present embodiment 1, the tooth point 24 is integrally installed to the adapter 22, the bolt 8 is screwed in into the internal thread 3 provided on the projection end part side of the lateral pin body 2 through the seal washer 5, the washer 6 and the seal washer 7, thus even in the case where the working machine bucket 21 is used outdoors over a long period of time, being exposed to storm water, and the like, no moisture will reach the threaded part of the bolt 8 and the internal thread 3, and as a result, it can be avoided that these critical portions of the lateral pin 1 generate rust.

Next, how to remove the tooth point 24 from the adapter 22 will be described. The removing operation is initiated by using a tool such as a wrench, or the like, to loosen the bolt 8 to remove it together with the seal washer 5, the washer 6, and the seal washer 7 from the internal thread 3. At this time, as described above, since no rust is generated in the threaded part of the bolt 8 and on the internal thread 3, the bolt 8 can be easily and simply removed.

Then, the lateral pin body 2 is extracted together with the washer 4 from the lateral hole 24 a on one side of the tooth point 24.

Such an operation of extracting the lateral pin body 2. is repeated by the number of times equal to the number of adapters 22 disposed in a row (for example, 5).

According to the lateral pin 1 for use with lateral pin type fixture for working machine bucket of the present embodiment 1, even in the case where the working machine bucket 21 is used outdoors over a long period of time, being exposed to storm water, and the like, no moisture will reach the threaded part of the bolt 8 and the internal thread 3 to cause rust to occur; yet there is no need for using a special tool for removing the pin, and only with an ordinal tool, the pin removal can be simply and easily made; the need for making a hazardous hammering operation is eliminated, which provides excellency in terms of securing the safety of operator; and thus it is capable of making the pin removal operation simpler and easier, and assuring the operational safety.

Embodiment 2

With reference to FIG. 24 and FIG. 25, a lateral pin 11 for use with lateral pin type fixture for working machine bucket pertaining to the present embodiment 2 will be described.

As shown in FIG. 24 and FIG. 25, the lateral pin 11 for use with lateral pin type fixture for working machine bucket pertaining to the present embodiment 2 is also configured such that an adapter 22 and a tooth point 24 for the above-mentioned working machine bucket 21 as shown in FIG. 5 are fixedly installed to each other as if they were an integral part by the screw fastening method.

In other words, the lateral pin 11 for use with lateral pin type fixture for working machine bucket pertaining to the present embodiment 2 includes a bolt type lateral pin body 12 provided with an external thread 13 in the projection end part region thereof; a washer 14 loaded on the basal end part side of the lateral pin body 12; a washer 15 and a seal washer 16 covered with a sealing material, such as a rubber gasket, or the like, against storm water which are intervened on the projection end part side of the lateral pin body 12; and a cap nut 17 screw-fastened to the external thread 13 of the lateral pin body 12.

The lateral pin 11 may have a configuration as shown in FIG. 3 and FIG. 4 illustrating a variant embodiment 2 of the first invention, the adapter 22 may have a recessed part 111 c as shown in the same figure, and the tooth point 24 may have a recessed part 111 b as in the embodiment of the second invention. In addition, a seal washer 16 a may be added before screw fastening.

When the lateral pin 11 for use with lateral pin type fixture for working machine bucket of the present embodiment 2 is used to fixedly install the tooth point 24 to the adapter 22 as if they were an integral part, a receiving recessed portion 25 provided in the tooth point 24 is first opposed to a loading projected portion 22 a of the adapter 22, then the tooth point 24 is inserted into the adapter 22 in the same manner as described above for the first embodiment.

Next, the washer 14 is loaded on the basal end part side of the lateral pin body 12, and this lateral pin body 12 is inserted into a lateral hole 24 a on one side of the tooth point 24, a lateral hole 22 b of the adapter 22, and a lateral hole 24 a on the other side of the tooth point 24 in this order.

Next, on the circumference of the external thread 13 in the projection end part region of the lateral pin body 12, the washer 15 and the seal washer 16 are loaded in this order, and in this state, the cap nut 17 is screw-fastened to the external thread 13 to be tightened.

Thus, with the lateral pin 11 for use with lateral pin type fixture for working machine bucket, the adapter 22 and the tooth point 24 can be fixedly installed to each other as if they were an integral part.

Such an operation of fixedly installing the adapter 22 and the tooth point 24 to each other by means of the lateral pin 11 for use with lateral pin type fixture for working machine bucket is repeated by the number of times equal to the number of adapters 22 disposed in a row (for example, 5), whereby the tooth points 24 on the side of the ground-leveling plate 23 can be rigidly and integrally installed to the adapters 22 of the working machine bucket 21, respectively.

Once, by using the lateral pin 11 for use with lateral pin type fixture for working machine bucket of the present embodiment 2, the tooth point 24 is integrally installed to the adapter 22, the cap nut 17 is screwed in to the external thread 13 in the projection end part region of the lateral pin body 12 through the washer 15 and the seal washer 16, thus even in the case where the working machine bucket 21 is used outdoors over a long period of time, being exposed to storm water, and the like, no moisture will reach the external thread 13 of the lateral pin body 12, and as a result, it can be avoided that these critical portions of the lateral pin 11 generate rust.

Next, how to remove the tooth point 24 from the adapter 22 will be described. The removing operation is initiated by using a tool such as a wrench, or the like, to loosen the cap nut 17 to remove it from the external thread 13. At this time, as described above, since no rust is generated on the external thread 13, the cap nut 17 can be easily and simply removed. Further the washer 15 and the seal washer 16 are also removed from the external thread 13.

Then, the lateral pin body 12 is extracted together with the washer 14 from the lateral hole 24 a on one side of the tooth point 24.

Such an operation of extracting the lateral pin body 12 is repeated by the number of times equal to the number of adapters 22 disposed in a row (for example, 5).

According to the lateral pin 11 for use with lateral pin type fixture for working machine bucket of the present embodiment 2, even in the case where the working machine bucket 21 is used outdoors over a long period of time, being exposed to storm water, and the like, no moisture will reach the threaded part of the bolt 8 and the internal thread 13 to cause rust to occur; yet there is no need for using a special tool for removing the pin, and only with an ordinal tool, the pin removal can be simply and easily made; the need for making a hazardous hammering operation is eliminated, which provides excellency in terms of securing the safety of operator; and thus it is capable of making the pin removal operation simpler and easier, and assuring the operational safety.

Embodiment of Second Invention

Hereinbelow, a lateral pin type tooth point structure for working machine bucket pertaining to an embodiment of a second invention will be described in detail.

The lateral pin type tooth point structure for working machine bucket pertaining to the embodiment of the present invention is configured such that, by means of a lateral pin 101 as described below, the adapter 22 for the working machine bucket 21 as shown in FIG. 5 as described above and a tooth point 111 having substantially the same configuration as that of the above-described tooth point 24 are fixedly installed to each other as if they were an integral part by the lateral pin type screw fastening method.

In other words, the lateral pin 101 in the lateral pin type tooth point structure for working machine bucket pertaining to the present embodiment includes, as shown in FIG. 26 and FIG. 18 to FIG. 21, a pin body 102 having a polygonal, for example, hexagonal head portion 102 a, and provided with an internal thread part 102 b on the insertion tip side; a disk-like washer 103 fitted to this pin body 102, and attached to a lateral hole 112 provided on one side of the tooth point 111; a set bolt 104 having an external thread part 104 b screwed in into the internal thread part 102 b of the pin body 102 in the lateral hole 112 provided on the other side of the tooth point 111, and having a polygonal, for example, hexagonal head portion 104 a; and a disk-like washer 105 and two seal washers 106 a, 106 b fitted to the external thread part 104 b of the set bolt 104 and attached to the lateral hole 112 provided on the other side of the tooth point 111, being disposed so as to sandwich this washer 105 and having a sealing function against storm water, and the like.

The lateral pin 101 may be formed or configured to have a geometry as shown in FIG. 10 illustrating the variant embodiment of the second invention.

As shown in FIG. 27 to FIG. 32, the tooth point 111 pertaining to the present embodiment has a three-D structure giving substantially a rectangular top view and substantially a triangular front view; on the basal end part side, has a receiving recessed portion 113 into which a loading projected portion 122 a (FIG. 33) of an adapter 122 disposed on the ground excavation edge part side of the above-described working machine bucket 21 (FIG. 5 and FIG. 33) is fitted; and in both side walls of this receiving recessed portion 113, is provided with a pair of lateral holes 112 for insertion of the lateral pin 101.

The tooth point 111 may be formed or configured to have a geometry as shown in FIG. 10 to FIG. 17 illustrating the variant embodiment of the second invention.

In the regions of the respective lateral holes 112 on one side and the other side of the tooth point 111, a concaved part 114 is provided to protect the respective head portions 102 a, 104 a of the pin body 102 and the set bolt 104 against damage due to contact with the soil, and the like, at the time of ground excavation by the working machine bucket.

The concaved part 114 of the tooth point 111 pertaining to the present embodiment that is illustrated is provided with substantially a semi-circular geometry, however, in the present invention, the type of the geometry of the pertinent portion is not limited, and the geometry of the pertinent portion may be, for example, a triangle, a square, or any other polygon besides the geometry shown.

Further, the tooth point 111 pertaining to the present embodiment is provided with a width on the tip 111 a side that is approx. 10 mm longer than that of the prior art for improving the durability.

Further, the tooth point 111 pertaining to the present embodiment that is shown may have a recessed part 111 b with an appropriate geometry, for example, a rectangular shape in the pertinent flat portion as shown in each figure giving a plan of the top and bottom surfaces. And in the present invention, the pertinent flat portion may be plainly flat with no recessed portion, or the like being formed, and in the present invention, the pertinent flat portion may be provided with a convex or projected portion having an appropriate geometry.

The respective geometries of the head portion 102 a of the pin body 102 and the head portion 104 a of the set bolt 104 are not limited to a hexagon, and for example, may be a polygon, such as a square, octagon, or the like.

Next, how to fixedly install the tooth point 111 and the adapter 122 to each other as if they were an integral part using the lateral pin 101 of the present embodiment will be described.

A receiving recessed portion 113 provided in the tooth point 111 is first opposed to a loading projected portion 122 a of the adapter 122, then the tooth point 111 is inserted into the adapter 122.

Next, the washer 103 is loaded on the basal end part side of the lateral pin body 102, and this lateral pin body 102 is inserted into a lateral hole 112 on one side of the tooth point 111, a lateral hole 122 b of the adapter 122, and a lateral hole 112 on the other side of the tooth point 111 in this order.

Next, the seal washer 106 a, the washer 105, and the seal washer 106 b are fitted to the set bolt 104 in this order, and from the outside of the lateral hole 112 on the other side of the tooth point 111, the external thread part 104 b of the set bolt 104 is screwed in into the internal thread part 102 b of the pin body 102 to be tightened for attaching the seal washer 106 a, the washer 105, and the seal washer 106 b to the end of the lateral hole 112 on the other side of the tooth point 111.

Thus, with the lateral pin 101, the adapter 122 and the tooth point 111 can be fixedly installed to each other as if they were an integral part, as shown in FIG. 17 and FIG. 33.

Such an operation of fixedly installing the adapter 122 and the tooth point 111 to each other is repeated by the number of times equal to the number of adapters 122 disposed in a row (for example, 5), whereby the tooth points 111 can be rigidly and integrally installed to the adapters 22 (122) of the working machine bucket 21 (FIG. 5 and FIG. 33), respectively.

In this case, in the present embodiment, the seal washer 106 a, the washer 105, and the seal washer 106 b are fitted to the set bolt 104 screwed in into the internal thread part 102 b of the pin body 102, being attached to the end of the lateral hole 112 on the other side of the tooth point 111, thus even in the case where the working machine bucket 21 is used outdoors over a long period of time, being exposed to storm water, and the like, no moisture will reach the external thread part 104 b of the set bolt 104 and the internal thread part 102 b of the pin body 102, and as a result, it can be avoided that these critical portions of the lateral pin 101 generate rust.

Next, how to remove the tooth point 111 from the adapter 22 (122) of the working machine bucket 21 (FIG. 5 and FIG. 33) will be described.

The removing operation is made by using an ordinal tool, such as a ratchet wrench, a ring wrench, or the like. The ratchet wrench, for example, is applied to the head portion 104 a of the set bolt 104 to turn it for loosening and removing the set bolt 104 from the pin body 102. At this time, as described above, since no rust is generated in the external thread part 104 b of the set bolt 104 and the internal thread part 102 b of the pin body 102, the set bolt 104 can be removed extremely easily.

And by extracting the pin body 102 from the respective lateral holes, the tooth point 111 can be extremely simply and easily removed from the the adapter 22 (122) of the working machine bucket 21 (FIG. 5 and FIG. 33).

Thus, in the present embodiment, the head portion 102 a of the pin body 102, and the head portion 104 a of the set bolt 104 are made polygonal, for example, hexagonal, thus there is no need for using a special tool for removing the lateral pin 101, and only with an ordinal tool, such as a ratchet wrench, a ring wrench, or the like, the pin removal can be simply and easily made; the need for making a hazardous hammering operation in pin removal as is required with the prior art is eliminated, which assures the safety of operator being secured.

The above-described operation of loading the tooth point 111 to the adapter 22 (122) of the working machine bucket 21 (FIG. 5 and FIG. 33), or that of unloading the tooth point 111 from the adapter 22 (122) as described above are repeated by the number of times equal to the number of adapters 22 (122) disposed in a row (for example, 5).

The lateral pin 101 and tooth point 111 in the lateral pin type tooth point structure for working machine bucket pertaining to the present embodiment can, of course, be interchanged with the conventional lateral pin and tooth point which are used with the adapter in various existing working machine buckets, and the like.

INDUSTRIAL APPLICABILITY

The lateral pin of the first invention, and the lateral pin type tooth point structure of the second invention are applicable not only to the above-mentioned working machine bucket for power shovels, shovel loaders, and the like, but also machines and instruments which use a lateral pin connection structure for connecting/disconnecting one member to/from another member as required.

Description of Symbols

1: Lateral pin

2: Lateral pin body

3: Internal thread

4: Washer

5: Seal washer

6: Washer

7: Seal washer

8: Bolt

11: Lateral pin

12: Lateral pin body

13: External thread

14: Washer

15: Washer

16: Seal washer

17: Cap nut

21: Working machine bucket

22: Adapter

22 a: Loading projected portion

22 b: Lateral hole

23: Ground-leveling plate

24: Tooth point

24 a: Lateral hole

25: Receiving recessed portion

101: Lateral pin

102: Pin body

102 a: Head portion

102 b: Internal thread part

103: Washer

104: Set bolt

104 a: Head portion

104 b: External thread part

105: Washer

106 a: Seal washer

106 b: Seal washer

111: Tooth point

111 a: Tip

111 b: Recessed part

112: Lateral hole

113: Receiving recessed portion

114: Concaved part

121: Working machine bucket

122: Adapter

122 a: Loading projected portion

122 b: Lateral hole 

1. A lateral pin for use with lateral pin type fixture for working machine bucket that is inserted into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastened on the other side thereof for fixedly installing said tooth point to said adapter, comprising: a bolt type lateral pin body having a threaded part for screw fastening in a projection end part thereof; a washer loaded on the basal end part side of said lateral pin body; a washer and a sealing material against storm water, and the like, intervened on the projection end part side of said lateral pin body; and a screw thread fastener screw-fastened to said threaded part.
 2. A lateral pin for use with lateral pin type fixture for working machine bucket that is inserted into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastened on the other side thereof for fixedly installing said tooth point to said adapter, comprising: a bolt type lateral pin body provided with an internal thread toward the inside of a projection end part thereof; a washer loaded on the basal end part side of said lateral pin body; a seal washer covered with a sealing material against storm water, and the like, a washer, and a seal washer covered with a sealing material against storm water, and the like, which are intervened on the projection end part side of said lateral pin body; and a bolt screw-fastened to the internal thread of said lateral pin body.
 3. A lateral pin for use with lateral pin type fixture for working machine bucket that is inserted into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastened on the other side thereof for fixedly installing said tooth point to said adapter, comprising: a bolt type lateral pin body provided with an external thread in the projection end part region thereof; a washer loaded on the basal end part side of said lateral pin body; a washer and a seal washer covered with a sealing material against storm water, and the like, which are intervened in the projection end part region of said lateral pin body; and a cap nut screw-fastened to the external thread of said lateral pin body.
 4. A lateral pin type tooth point structure for working machine bucket which inserts a lateral pin into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastens the lateral pin on the other side thereof for fixedly installing said tooth point to said adapter, wherein said lateral pin includes a pin body with a polygonal head portion and an internal thread part provided on the insertion tip side thereof, and a set bolt with an external thread part screwed in into the internal thread part of the pin body on the other side of said respective lateral holes, and a polygonal head portion; said tooth point is provided with a receiving recessed portion on the basal end part side thereof into which a loading projected portion of the adapter of said working machine bucket is fitted; on both side walls of this receiving recessed portion, a pair of lateral holes for insertion of the lateral pin is provided; and in the respective regions of the pair of lateral holes, a concaved part for protecting said lateral pin head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket is provided.
 5. A lateral pin type tooth point structure for working machine bucket which inserts a lateral pin into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastens the lateral pin on the other side thereof for fixedly installing said tooth point to said adapter, wherein said lateral pin includes a pin body with a polygonal head portion and an internal thread part provided on the insertion tip side thereof; a washer fitted to this pin body, and attached to one side of said respective lateral holes; a set bolt with an external thread part screwed in into the internal thread part of the pin body on the other side of said respective lateral holes, and a polygonal head; a washer fitted to the threaded part of said set bolt on the other side of said lateral hole; and a seal washer having a sealing function; said tooth point is provided with a receiving recessed portion on the basal end part side thereof into which a loading projected portion of the adapter of said working machine bucket is fitted; on both side walls of this receiving recessed portion, a pair of lateral holes for insertion of the lateral pin is provided; and in the respective regions of the pair of lateral holes, a concaved part for protecting said lateral pin head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket is provided.
 6. A lateral pin type tooth point structure for working machine bucket which inserts a lateral pin into respective lateral holes penetrating through a particular one of adapters disposed in a row on the excavating edge part side of a working machine bucket and a tooth point fitted to that adapter from one side of the respective lateral holes, and screw-fastens the lateral pin on the other side thereof for fixedly installing said tooth point to said adapter, wherein said lateral pin includes a pin body with a polygonal head portion and an internal thread part provided on the insertion tip side thereof; a washer fitted to this pin body, and attached to one side of said respective lateral holes; a set bolt with an external thread part screwed in into the internal thread part of the pin body on the other side of said respective lateral holes, and a polygonal head; a washer fitted to the threaded part of said set bolt on the other side of said lateral hole; and two seal washers disposed so as to sandwich this washer, having a sealing function against storm water, and the like; said tooth point is provided with a receiving recessed portion on the basal end part side thereof into which a loading projected portion of the adapter of said working machine bucket is fitted; on both side walls of this receiving recessed portion, a pair of lateral holes for insertion of the lateral pin is provided; and in the respective regions of the pair of lateral holes, a concaved part for protecting said lateral pin head portion and set bolt head portion against damage due to the contact with the soil, and the like, at the time of ground excavation by the working machine bucket is provided. 